Running Wild with Bear Grylls: The Challenge

Bear takes Oscar winner Natalie Portman into the slot canyons of the Escalante Desert. Natalie will see if her training for Marvel's THOR: LOVE AND THUNDER pays off out in the wild.

Bear shows Shang-Chi star Simu Liu how to trigger avalanches, plunge into frozen lakes and traverse alpine terrain as temperatures drop below -20.

Ashton Kutcher joins Bear in Costa Rica, where Bear teaches him survival techniques as they traverse ocean plunges, jungle rivers, and volcanic cliffs.

Bear takes actress Florence Pugh on an adventure into Costa Rica and returns her to nature, imparting essential skills she then needs to replicate.

High in the Sierra Nevada Mountains, Bear Grylls teaches Anthony Anderson a series of survival skilss he'll need to master before completing the adventure.

Bear puts Rob Riggle through a series of mountain man survival tests in the Great Basin to prepare him for an upcoming movie role.